2. Design Standard for Structural Composite Lumber (ASTM D5456)
Key Parameters:
鈥tructural Composite Lumber聽 Standard: ASTM D5456-21e01
鈥� Structural Composite Lumber Scope: Applies to dry service conditions (moisture content < 16%)
鈥� Structural Composite Lumber Required Tests: Bending, tension, compression, shear, bond durability, etc.
鈥� Structural Composite Lumber Adjustment Factors: Based on product type and volume
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3. Volume Factor and Stability Considerations for SCL Members
Key Parameters:
鈥� Structural Composite Lumber Volume Factor (Cv):
鈥tructural Composite Lumber聽 For shallow members (d 鈮� 12″): Cv = (12/d)^(1/m1)
鈥tructural Composite Lumber聽 For deep members (d > 12″): Cv = (12/d)^(1/m2)
鈥tructural Composite Lumber聽 Column Stability Factor (CP): c = 0.9 for SCL
鈥� Structural Composite Lumber Beam Stability Factor (CL): Determined per NDS 3.3.3
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4. Quality Assurance and Characteristic Value Determination for SCL
Key Parameters:
鈥tructural Composite Lumber聽 Characteristic Values: Derived from test data per ASTM D5456
鈥tructural Composite Lumber聽 Design Stress: Adjusted using factors in Table 1 of ASTM D5456
鈥� Structural Composite Lumber Quality Control: Required for each production facility independently
鈥� Structural Composite Lumber Certification: Must be conducted by an independent qualifying agency
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